https://doi.org/10.1140/epjc/s10052-008-0816-y
Regular Article - Theoretical Physics
Hadronic top-quark pair production in association with a hard jet at next-to-leading order QCD: phenomenological studies for the Tevatron and the LHC
1
Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), 80805, München, Germany
2
Institut für Theoretische Teilchenphysik, Universität Karlsruhe, 76128, Karlsruhe, Germany
3
Institut für Physik, Universität Mainz, 55099, Mainz, Germany
* e-mail: stefanw@thep.physik.uni-mainz.de
Received:
14
October
2008
Revised:
21
November
2008
Published online:
20
December
2008
We report on the calculation of the next-to-leading order QCD corrections to the production of top–antitop-quark pairs in association with a hard jet at the Tevatron and at the LHC. Results for integrated and differential cross sections are presented. We find a significant reduction of the scale dependence. In most cases the corrections are below 20% indicating that the perturbative expansion is well under control. Moreover, the forward–backward charge asymmetry of the top quark, which is analyzed at the Tevatron, is studied at next-to-leading order. We find large corrections, suggesting that the definition of the observable has to be refined.
© Springer-Verlag , 2009
